#案例：演示break和continue！

a=[10,20,30,40,50]
for x in a:
    if x==30:
        # break
        continue
    print(x)


for i in range(1,10):
    for j in range(1,i+1):
        d = i * j
        print("%d*%d=%-2d"%(i,j,d),end =" ")
    print()